package com.example.controller;

import com.example.pojo.Result;
import com.example.pojo.User;
import com.example.service.UserService;
import com.example.utils.JwtUtil;
import com.example.utils.Md5Util;
import com.example.utils.ThreadLocalUtil;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;


import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RestController
@RequestMapping("/user")
@Validated
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    //注册接口
    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{5,16}$")String username, @Pattern(regexp = "^\\S{5,16}$")String password) {
        //参数校验

            //查询用户
            User u = userService.findByUserName(username);
            if (u == null) {
                //没有占用
                //注册
                userService.register(username, password);
                return Result.success();
            } else {
                //占用
                return Result.error("用户名已被占用");
            }
            //注册用户
    }


    //登录接口
    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$")String username,@Pattern(regexp = "^\\S{5,16}$")String password){
        //根据用户名查询用户
        User loginUser = userService.findByUserName(username);

        //判断该用户是否存在
        if (loginUser==null){
            return Result.error("用户名错误");
        }

        //判断密码是否正确 loginUser对象中的password是密文
        if (Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            //登陆成功
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token= JwtUtil.genToken(claims);
            //把token存储到redis中
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set(token,token,12, TimeUnit.HOURS);
            return Result.success(token);
        }

        return Result.error("密码错误");
    }

    //获取用户详细信息
    @GetMapping("/userInfo")
    public Result<User> userInfo(@RequestHeader(name = "Authorization") String token){
        //根据用户名查询用户
        /*Map<String,Object> map = JwtUtil.parseToken(token);
         String username =(String) map.get("username"); */
        Map<String,Object> map = ThreadLocalUtil.get();
        String username =(String) map.get("username");
        User user = userService.findByUserName(username);
        return  Result.success(user);
    }

    //更新用户详细信息
    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){
        userService.update(user);
        return Result.success();
    }

    //更新用户头像
    @PatchMapping("updateAvatar")
    public  Result updateAvatar(@RequestParam @URL String avatarUrl){
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    //更新用户密码
    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){
        //1.校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");

        if(!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要的参数");
        }
          //原密码是否正确
          //调用userService根据用户名拿到原密码，再和old_pwd比对
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if(!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码填写不正确");
        }
        //newPwd和rePwd是否一样
        if(!rePwd.equals(newPwd)){
            return Result.error("两次填写的新密码不一致");
        }
        //2.调用service完成密码更新
        userService.updatePwd(newPwd);
        //删除redis中对应的token
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return  Result.success();
    }
}



